Machine fob bending bods and tubes



L. H. McINTOSH.

MACHINE FOR BENDING RODS AND TUBES.

APPLICATION FILED .IAN.21. I9I9.

Patented Feb. 3 1920.

4 SHEETS-SHE I I I III l||||||III|\rII IIIIIL L H. MclNTOSH.

MACHINE FOR BENDING RODS AND TUBES.

APPLICATION FILED JAN-21.1919.

1,330,026. Patented Feb. 3,1920. I 4 SHEET SSHEEI 2- 257W QW L. H. MclNTOSH.

MACHINE FOR BENDING RODS AND TUBES.

APPLICMIDN FILED JAN.21.1919.

Patented Feb. 3, 1920.

4 SHEETS-SHEET'3.

L. H. MclNTOSH.

MACHINE FOR BENDING RODS AND TUBES.

APPUCATION FILED JAN. 27. 1919.

1 ,330,026 Patented Feb. 3, 1920.

4 SHEETS-SHEET 4.

37 3f 3/ Q ZZ 3 1 hole 22 in the stem of said member.

UNITED STATES PATENT OFFICE.

LOUIS H. McINTOS H, OF CLEVELAND, OHIO, ASSIGNOR. TO FRED HJAUSTIN, OF

' I CLEVEBAND, OHIO.

MACHINE FOR BENDING RODS AND TUBES.

- Specification of Letters Patent.

Application fiied iamia'r 27, 1919. Serial N5. 273,400.-

To'all whom it may comma.- a V Be it known that I, Loin's H. MoINTosH, a citizen of the United States, residing at Cleveland, in the county of Cuyahog'a and State of Ohio, have invented certain new and useful Improvements in Machines for Bending Rods and Tubes, of which the following is a specification.

This invention relates to a machine especially adapted for bending rods and tubes, the machinebeing of that type in which the work is clamped to a bed and is bent by a pivoted bender, operated in the present instance by hand.

In the accompanying drawings Figure 1 is a plan of the machine.

Fig. 2 is a detail of an operating lever.

Fig. 3 is a plan illustrating the bending of a rod or bar to angular form.

Fig. 4 is a plan showing the machine used for bending pipe or the like on an arc.

Fig. 5 is a perspective view of the angular bender.

Fig. 6 is an inverted perspective view of one member of the clamp,

Fig. 7 is a section on the line 7'-7 of Fig. 1.

Fig. Fig. 3.

Fig. 9 is a section on the line 99 of Fig. 1.

Fig. 10 is a section on the line 10-10 of Fig. 1.

Fig. 11 is a detail of a roller used for are bending.

' Referring specifically to the drawing, A indicates a bed plate, which may be fastened to a bench or other support. This has at the center a circular hole 1, and also has radial grooves -2 and 3 at an angle of 90 with each other. Near one end the plate has a straight groove 6.

The clamp comprises two jaws 4 and 5, which are. adjustable along the grooves 2 and 3 respectively, the former being held by a bolt 11, and the latter being held by a screw 19, which extends through a threaded 8 is a section on the line 88 of screw 19 is held against longitudinal movement by a yoke 20, fastened to the plate by screws 21, and engaging between collars on the screw 19, which however can be turned to adjust the jaw by applying a wrench to the end 23. The grooves are undercut or T shaped to receive the head 12 of the bolt The 11 and the foot 18 of the member 5, respectively. 1 I

v These clamping jaws may be adjusted to receive therebetween work of various sizes,

orto vary their position with respect tothe axis of the bender. I I For bending an angle, I employ a block 25, integral with apivot pin26, which fits also supports a roller 35 of the desired ra' dius. Different rollers may be substituted according to the arc to be bent. To permit the change to be easily made, the roller is slotted as at 45, so that it may be slipped on or off the bushing 33 without disturbing the other parts. 'The lever 30 carries a bending roller 36 held by a screw 43 and bolt 3%, the

latter extending through a longitudinal slot 32 in the lever, and being fastened at adjustment by the nut 41.

When a rod or a bar is to be bent. to an angle, the bender 25 is used, lever 30 and the parts attached thereto being removed from the plate, by loosening the bolt 37 and slipping the same out of the end of the slot 6. Fig. 3 shows themachine so arranged. The work is then clamped between the jaws iand 5, the former having its face in line with the pivot and the latter being set off according to the width of the work. Then by swinging the bender 25 on the pivot, from the position shown in dotted lines to the position shown in full lines in Fig. 3, the work is given a right angle bend, around corner of the jaw 5.

For bending a tube or other piece of Work to an arc, the bender 25 is removed by lifting the pivot 26 out of the recess 1, and the lever 30 and its attached parts are set in place, as shown in Fig. 4, the Work being clamped between the jaws l and 5, and extending between the rollers 35 and 36. Then the lever 30'is'swung on the bolt 37 as its pivot,and the roller 36 describes an arc and bends the work around the roller to the extent desired.

Patented Feb. 3, 1920.

V The device occupies but little space, andof a bed plate, having a pivot opening, and

a pairof clamping aws, mounted on the plate on one side of said opening, said plate having a groove extending across the same at the opposite side of said opening, the opening being "adapted to receive the pivot of a removable angular bender,. and the groove being adapted to receive the pivot of a removable arc bender, whereby either the angular or the arc bender may be used on a piece of work held by the jaws.

2. In a bending machine, adapted for either angle or are bending, the combination Witnesses: I

of a bedplate having a pivot opening and grooves radiating from said opening at one side thereof, clamping jawsv adjustable in said grooves, said plate also having a groove, extending across the same at a distance from said opening, and an arc bender having a pivot bolt reinovably mounted in the last mentioned groove, said opening being adapted to receive the pivot of a removable angular bender to cotip'eratewith said ]aws by removal of the arc bender, whereby either bender may be used. r

In testimony whereof, I do aflix' my signa ture in presence of two Witnesses.

LOUIS H. MOINTVOSHF J OHN A. BOMMHARDT, Gr. W. ROSE BERG. 

